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Questions tagged [rkt]

rkt (pronounced "rock-it") is a container manager for Linux clusters. rkt can run the same container with varying degrees of protection, from lightweight, OS-level namespace and capabilities isolation to heavier, VM-level hardware virtualization.

Further information:

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Container technologies: docker, rkt, orchestration, kubernetes, GKE and AWS Container Service

I'm trying to get a good understanding of container technologies but am somewhat confused. It seems like certain technologies overlap different portions of the stack and different pieces of different technologies can be used as the DevOps team sees…
JL1680
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Can I run/convert a Docker-Compose project with/to CoreOS rkt?

Can I use CoreOS rkt, or some related tool, to run my Docker-Compose project? And / or is there some way to convert a Docker-Compose project to something similar, for CoreOS and rkt? My Docker-Compose project works fine on localhost and on the…
KajMagnus
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how to create a statically linked golang executable with go 1.5+

golang version < 1.5 - there are plenty of static linking examples, posts and recipes. What about >= 1.5? (google search has returned no useful results for my search terms.) Anyone have any recommendations on how to produce a statically linked…
Richard
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Why does Docker have a daemon?

I recently discovered rkt, a competitor container runtime to Docker. It seems like rkt does not need a daemon. For me, rkt is like running any other command and it works easily with systemd (or other init systems). This makes me wonder about the…
conradkleinespel
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hyperkube doesn't start any manifest from /etc/kubernetes/manifests

I have Container Linux by CoreOS alpha (1325.1.0) Installed on a pc at home. I played with kubernetes for a couple of month, but now after reinstalling ContainerOS and trying to install kubernetes using my fork at…
ufk
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What is the essential difference between docker and rkt?

How are they functioning differently? Which features of the kernel are they using?
NeoWang
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installing kubernetes on coreos with kubeconfig (instead of deprecated --api-server)

I have two coreos machines with CoreOS beta (1185.2.0). I install kuberentes with rkt containers using a modified script, the original script is at https://github.com/coreos/coreos-kubernetes/tree/master/multi-node/generic. the modified version is…
ufk
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mounted volumes don't get filled with docker image content

I'm running Container Linux by CoreOS 1618.0.0 (Ladybug). with rkt Version: 1.29.0 I created a systemd service file to run a docker nagios image: [Unit] Description=Nagios Requires=network-online.target local-fs.target After=network-online.target…
ufk
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When and Why should I care about different Container Runtimes?

I am trying to understand when someone should really care about the different containerRuntimes available like docker, containerd, rkt. I know there will be different reasons like security concerns, performace etc. Can anyone elaborate all the…
Chetanya Chopra
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How to use rkt as container runtime instead of docker for kubernetes?

I tried using rktlet(https://github.com/kubernetes-incubator/rktlet/blob/master/docs/getting-started-guide.md) But when I try to kubelet --cgroup-driver=systemd \ > --container-runtime=remote \ > --container-runtime-endpoint=/var/run/rktlet.sock…
JibinNajeeb
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How does coreos compare to triton?

Recently some alternatives for running docker containers or even the app container have developed. I know that there is rkt from coreos (https://coreos.com/blog/rocket/) and triton from joyent (https://www.joyent.com/) How do these two approaches…
Georg Heiler
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starting calicoctl container on coreos

I have CoreOS beta (1153.4.0) I'm trying to run calicoctl to check if my calico networking is properly configured. so I'm trying to run a calicoctl rkt container with the command rkt run quay.io/calico/ctl and I get the output image: using image…
ufk
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Add a local dependency to an ACI in acbuild

I'm currently experimenting with ACI construction for rkt-containers. During my experiments I've built some containers especially for the use as a dependency. I now want to use these .aci images as a dependency for other images. As these files are…
TheBitFighter
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How can I trigger a reload of resolv.conf in my containers?

When running containers on startup I noticed some were using resolv.conf before systemd-resolved had updated it from the default using DHCP. This meant that containers that started too early after boot could not resolve anything and needed to be…
dippynark
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How can I run VMs on Container Linux?

I've been investigating CoreOS's Container Linux recently and was wondering if there's a 'nice' way to run Container Linux VMs on Container Linux, possibly with rkt. I understand rkt has a KVM stage 1 so was wondering how easy it is to use…
dippynark
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